mfd: Add MAX77693 driver
This patch adds MFD driver for MAX77693 to enable its sub devices.
The MAX77693 is a multi-function devices. It includes PMIC,
MUIC(Micro USB Interface Controller), flash LED control and
haptic motor control.
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Myungjoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
diff --git a/drivers/mfd/max77693.c b/drivers/mfd/max77693.c
new file mode 100644
index 0000000..c852515
--- /dev/null
+++ b/drivers/mfd/max77693.c
@@ -0,0 +1,217 @@
+/*
+ * max77693.c - mfd core driver for the MAX 77693
+ *
+ * Copyright (C) 2012 Samsung Electronics
+ * SangYoung Son <hello.son@smasung.com>
+ *
+ * This program is not provided / owned by Maxim Integrated Products.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * This driver is based on max8997.c
+ */
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/err.h>
+#include <linux/interrupt.h>
+#include <linux/pm_runtime.h>
+#include <linux/mutex.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/max77693.h>
+#include <linux/mfd/max77693-private.h>
+#include <linux/regulator/machine.h>
+#include <linux/regmap.h>
+
+#define I2C_ADDR_PMIC (0xCC >> 1) /* Charger, Flash LED */
+#define I2C_ADDR_MUIC (0x4A >> 1)
+#define I2C_ADDR_HAPTIC (0x90 >> 1)
+
+static struct mfd_cell max77693_devs[] = {
+ { .name = "max77693-pmic", },
+ { .name = "max77693-charger", },
+ { .name = "max77693-flash", },
+ { .name = "max77693-muic", },
+ { .name = "max77693-haptic", },
+};
+
+int max77693_read_reg(struct regmap *map, u8 reg, u8 *dest)
+{
+ unsigned int val;
+ int ret;
+
+ ret = regmap_read(map, reg, &val);
+ *dest = val;
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(max77693_read_reg);
+
+int max77693_bulk_read(struct regmap *map, u8 reg, int count, u8 *buf)
+{
+ int ret;
+
+ ret = regmap_bulk_read(map, reg, buf, count);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(max77693_bulk_read);
+
+int max77693_write_reg(struct regmap *map, u8 reg, u8 value)
+{
+ int ret;
+
+ ret = regmap_write(map, reg, value);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(max77693_write_reg);
+
+int max77693_bulk_write(struct regmap *map, u8 reg, int count, u8 *buf)
+{
+ int ret;
+
+ ret = regmap_bulk_write(map, reg, buf, count);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(max77693_bulk_write);
+
+int max77693_update_reg(struct regmap *map, u8 reg, u8 val, u8 mask)
+{
+ int ret;
+
+ ret = regmap_update_bits(map, reg, mask, val);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(max77693_update_reg);
+
+static const struct regmap_config max77693_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = MAX77693_PMIC_REG_END,
+};
+
+static int max77693_i2c_probe(struct i2c_client *i2c,
+ const struct i2c_device_id *id)
+{
+ struct max77693_dev *max77693;
+ struct max77693_platform_data *pdata = i2c->dev.platform_data;
+ u8 reg_data;
+ int ret = 0;
+
+ max77693 = devm_kzalloc(&i2c->dev,
+ sizeof(struct max77693_dev), GFP_KERNEL);
+ if (max77693 == NULL)
+ return -ENOMEM;
+
+ max77693->regmap = devm_regmap_init_i2c(i2c, &max77693_regmap_config);
+ if (IS_ERR(max77693->regmap)) {
+ ret = PTR_ERR(max77693->regmap);
+ dev_err(max77693->dev,"failed to allocate register map: %d\n",
+ ret);
+ goto err_regmap;
+ }
+
+ i2c_set_clientdata(i2c, max77693);
+ max77693->dev = &i2c->dev;
+ max77693->i2c = i2c;
+ max77693->irq = i2c->irq;
+ max77693->type = id->driver_data;
+
+ if (!pdata)
+ goto err_regmap;
+
+ max77693->wakeup = pdata->wakeup;
+
+ mutex_init(&max77693->iolock);
+
+ if (max77693_read_reg(max77693->regmap,
+ MAX77693_PMIC_REG_PMIC_ID2, ®_data) < 0) {
+ dev_err(max77693->dev, "device not found on this channel\n");
+ ret = -ENODEV;
+ goto err_regmap;
+ } else
+ dev_info(max77693->dev, "device ID: 0x%x\n", reg_data);
+
+ max77693->muic = i2c_new_dummy(i2c->adapter, I2C_ADDR_MUIC);
+ i2c_set_clientdata(max77693->muic, max77693);
+
+ max77693->haptic = i2c_new_dummy(i2c->adapter, I2C_ADDR_HAPTIC);
+ i2c_set_clientdata(max77693->haptic, max77693);
+
+ pm_runtime_set_active(max77693->dev);
+
+ ret = mfd_add_devices(max77693->dev, -1, max77693_devs,
+ ARRAY_SIZE(max77693_devs), NULL, 0);
+ if (ret < 0)
+ goto err_mfd;
+
+ return ret;
+
+err_mfd:
+ i2c_unregister_device(max77693->muic);
+ i2c_unregister_device(max77693->haptic);
+err_regmap:
+ kfree(max77693);
+
+ return ret;
+}
+
+static int max77693_i2c_remove(struct i2c_client *i2c)
+{
+ struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
+
+ mfd_remove_devices(max77693->dev);
+ i2c_unregister_device(max77693->muic);
+ i2c_unregister_device(max77693->haptic);
+
+ return 0;
+}
+
+static const struct i2c_device_id max77693_i2c_id[] = {
+ { "max77693", TYPE_MAX77693 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, max77693_i2c_id);
+
+static struct i2c_driver max77693_i2c_driver = {
+ .driver = {
+ .name = "max77693",
+ .owner = THIS_MODULE,
+ },
+ .probe = max77693_i2c_probe,
+ .remove = max77693_i2c_remove,
+ .id_table = max77693_i2c_id,
+};
+
+static int __init max77693_i2c_init(void)
+{
+ return i2c_add_driver(&max77693_i2c_driver);
+}
+/* init early so consumer devices can complete system boot */
+subsys_initcall(max77693_i2c_init);
+
+static void __exit max77693_i2c_exit(void)
+{
+ i2c_del_driver(&max77693_i2c_driver);
+}
+module_exit(max77693_i2c_exit);
+
+MODULE_DESCRIPTION("MAXIM 77693 multi-function core driver");
+MODULE_AUTHOR("SangYoung, Son <hello.son@samsung.com>");
+MODULE_LICENSE("GPL");